diff --git a/requirements.txt b/requirements.txt
index 66e5b16..d0419f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-pbr<2.0,>=0.11
+pbr<2.0,>=1.3
 cliff>=1.13.0 # Apache-2.0
 anyjson>=0.3.3
 httplib2>=0.7.5
@@ -11,13 +11,13 @@
 paramiko>=1.13.0
 netaddr>=0.7.12
 testrepository>=0.0.18
-pyOpenSSL>=0.11
+pyOpenSSL>=0.14
 oslo.concurrency>=2.1.0 # Apache-2.0
 oslo.config>=1.11.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
-oslo.log>=1.2.0 # Apache-2.0
+oslo.log>=1.6.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
-oslo.utils>=1.6.0 # Apache-2.0
+oslo.utils>=1.9.0 # Apache-2.0
 six>=1.9.0
 iso8601>=0.1.9
 fixtures>=1.3.1
diff --git a/setup.py b/setup.py
index 056c16c..d8080d0 100644
--- a/setup.py
+++ b/setup.py
@@ -25,5 +25,5 @@
     pass
 
 setuptools.setup(
-    setup_requires=['pbr'],
+    setup_requires=['pbr>=1.3'],
     pbr=True)
diff --git a/tempest/api/compute/test_quotas.py b/tempest/api/compute/test_quotas.py
index e302798..9f37143 100644
--- a/tempest/api/compute/test_quotas.py
+++ b/tempest/api/compute/test_quotas.py
@@ -20,6 +20,13 @@
 
 class QuotasTestJSON(base.BaseV2ComputeTest):
 
+    @classmethod
+    def skip_checks(cls):
+        super(QuotasTestJSON, cls).skip_checks()
+        if not test.is_extension_enabled('os-quota-sets', 'compute'):
+            msg = "quotas extension not enabled."
+            raise cls.skipException(msg)
+
     def setUp(self):
         # NOTE(mriedem): Avoid conflicts with os-quota-class-sets tests.
         self.useFixture(fixtures.LockFixture('compute_quotas'))
diff --git a/tempest/api/object_storage/test_object_slo.py b/tempest/api/object_storage/test_object_slo.py
index 9aa1b82..5811cb8 100644
--- a/tempest/api/object_storage/test_object_slo.py
+++ b/tempest/api/object_storage/test_object_slo.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 import hashlib
-import json
 
+from oslo_serialization import jsonutils as json
 from tempest_lib import exceptions as lib_exc
 
 from tempest.api.object_storage import base
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index adc81d6..5203444 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -181,6 +181,8 @@
     def test_attach_volumes_with_nonexistent_volume_id(self):
         srv_name = data_utils.rand_name('Instance')
         server = self.create_server(srv_name)
+        self.addCleanup(self.servers_client.wait_for_server_termination,
+                        server['id'])
         self.addCleanup(self.servers_client.delete_server, server['id'])
         waiters.wait_for_server_status(self.servers_client, server['id'],
                                        'ACTIVE')
diff --git a/tempest/cmd/cleanup.py b/tempest/cmd/cleanup.py
index ed6716e..7898035 100755
--- a/tempest/cmd/cleanup.py
+++ b/tempest/cmd/cleanup.py
@@ -51,10 +51,10 @@
 Please run with **--help** to see full list of options.
 """
 import argparse
-import json
 import sys
 
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 
 from tempest import clients
 from tempest.cmd import cleanup_service
diff --git a/tempest/cmd/run_stress.py b/tempest/cmd/run_stress.py
index 06b338d..0448589 100755
--- a/tempest/cmd/run_stress.py
+++ b/tempest/cmd/run_stress.py
@@ -16,7 +16,6 @@
 
 import argparse
 import inspect
-import json
 import sys
 try:
     from unittest import loader
@@ -25,6 +24,7 @@
     from unittest2 import loader
 
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 from testtools import testsuite
 
 from tempest.stress import driver
diff --git a/tempest/cmd/verify_tempest_config.py b/tempest/cmd/verify_tempest_config.py
index 2269d41..9e7d894 100755
--- a/tempest/cmd/verify_tempest_config.py
+++ b/tempest/cmd/verify_tempest_config.py
@@ -15,11 +15,11 @@
 #    under the License.
 
 import argparse
-import json
 import os
 import sys
 
 import httplib2
+from oslo_serialization import jsonutils as json
 from six import moves
 from six.moves.urllib import parse as urlparse
 
diff --git a/tempest/common/glance_http.py b/tempest/common/glance_http.py
index 5cd844c..4be3da1 100644
--- a/tempest/common/glance_http.py
+++ b/tempest/common/glance_http.py
@@ -17,7 +17,6 @@
 
 import copy
 import hashlib
-import json
 import posixpath
 import re
 import socket
@@ -25,6 +24,7 @@
 
 import OpenSSL
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 import six
 from six import moves
 from six.moves import http_client as httplib
diff --git a/tempest/common/isolated_creds.py b/tempest/common/isolated_creds.py
index 2102638..ff4eda9 100644
--- a/tempest/common/isolated_creds.py
+++ b/tempest/common/isolated_creds.py
@@ -51,11 +51,21 @@
     def create_project(self, name, description):
         pass
 
-    def assign_user_role(self, user, project, role_name):
+    def _check_role_exists(self, role_name):
         try:
             roles = self._list_roles()
             role = next(r for r in roles if r['name'] == role_name)
         except StopIteration:
+            return None
+        return role
+
+    def create_user_role(self, role_name):
+        if not self._check_role_exists(role_name):
+            self.identity_client.create_role(role_name)
+
+    def assign_user_role(self, user, project, role_name):
+        role = self._check_role_exists(role_name)
+        if not role:
             msg = 'No "%s" role found' % role_name
             raise lib_exc.NotFound(msg)
         try:
@@ -196,16 +206,27 @@
         email = data_utils.rand_name(root) + suffix + "@example.com"
         user = self.creds_client.create_user(
             username, user_password, project, email)
+        role_assigned = False
         if admin:
             self.creds_client.assign_user_role(user, project,
                                                CONF.identity.admin_role)
+            role_assigned = True
         # Add roles specified in config file
         for conf_role in CONF.auth.tempest_roles:
             self.creds_client.assign_user_role(user, project, conf_role)
+            role_assigned = True
         # Add roles requested by caller
         if roles:
             for role in roles:
                 self.creds_client.assign_user_role(user, project, role)
+                role_assigned = True
+        # NOTE(mtreinish) For a user to have access to a project with v3 auth
+        # it must beassigned a role on the project. So we need to ensure that
+        # our newly created user has a role on the newly created project.
+        if self.identity_version == 'v3' and not role_assigned:
+            self.creds_client.create_user_role('Member')
+            self.creds_client.assign_user_role(user, project, 'Member')
+
         creds = self.creds_client.get_credentials(user, project, user_password)
         return cred_provider.TestResources(creds)
 
diff --git a/tempest/scenario/utils.py b/tempest/scenario/utils.py
index cd9d925..b1246d2 100644
--- a/tempest/scenario/utils.py
+++ b/tempest/scenario/utils.py
@@ -13,11 +13,11 @@
 #    under the License.
 
 
-import json
 import re
 import string
 import unicodedata
 
+from oslo_serialization import jsonutils as json
 from tempest_lib.common.utils import misc
 import testscenarios
 import testtools
diff --git a/tempest/services/baremetal/base.py b/tempest/services/baremetal/base.py
index 1461198..2ac3fb2 100644
--- a/tempest/services/baremetal/base.py
+++ b/tempest/services/baremetal/base.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 import functools
-import json
 
+from oslo_serialization import jsonutils as json
 import six
 from six.moves.urllib import parse as urllib
 
diff --git a/tempest/services/compute/json/agents_client.py b/tempest/services/compute/json/agents_client.py
index e0e3ec3..525946e 100644
--- a/tempest/services/compute/json/agents_client.py
+++ b/tempest/services/compute/json/agents_client.py
@@ -12,8 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import agents as schema
diff --git a/tempest/services/compute/json/aggregates_client.py b/tempest/services/compute/json/aggregates_client.py
index e275895..28d4ff5 100644
--- a/tempest/services/compute/json/aggregates_client.py
+++ b/tempest/services/compute/json/aggregates_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from tempest_lib import exceptions as lib_exc
 
 from tempest.api_schema.response.compute.v2_1 import aggregates as schema
diff --git a/tempest/services/compute/json/availability_zone_client.py b/tempest/services/compute/json/availability_zone_client.py
index 9686854..c74fd10 100644
--- a/tempest/services/compute/json/availability_zone_client.py
+++ b/tempest/services/compute/json/availability_zone_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import availability_zone \
     as schema
diff --git a/tempest/services/compute/json/baremetal_nodes_client.py b/tempest/services/compute/json/baremetal_nodes_client.py
index 42caa7b..20be790 100644
--- a/tempest/services/compute/json/baremetal_nodes_client.py
+++ b/tempest/services/compute/json/baremetal_nodes_client.py
@@ -12,8 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import baremetal_nodes \
diff --git a/tempest/services/compute/json/certificates_client.py b/tempest/services/compute/json/certificates_client.py
index da1aa94..c25b273 100644
--- a/tempest/services/compute/json/certificates_client.py
+++ b/tempest/services/compute/json/certificates_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import certificates as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/extensions_client.py b/tempest/services/compute/json/extensions_client.py
index ec60872..da342a8 100644
--- a/tempest/services/compute/json/extensions_client.py
+++ b/tempest/services/compute/json/extensions_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import extensions as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/fixed_ips_client.py b/tempest/services/compute/json/fixed_ips_client.py
index b921107..69de79f 100644
--- a/tempest/services/compute/json/fixed_ips_client.py
+++ b/tempest/services/compute/json/fixed_ips_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import fixed_ips as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/flavors_client.py b/tempest/services/compute/json/flavors_client.py
index 2f7de3f..b928f9f 100644
--- a/tempest/services/compute/json/flavors_client.py
+++ b/tempest/services/compute/json/flavors_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import flavors as schema
diff --git a/tempest/services/compute/json/floating_ips_client.py b/tempest/services/compute/json/floating_ips_client.py
index 1a32861..8923d64 100644
--- a/tempest/services/compute/json/floating_ips_client.py
+++ b/tempest/services/compute/json/floating_ips_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/compute/json/hosts_client.py b/tempest/services/compute/json/hosts_client.py
index 0510104..d597a06 100644
--- a/tempest/services/compute/json/hosts_client.py
+++ b/tempest/services/compute/json/hosts_client.py
@@ -12,8 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import hosts as schema
diff --git a/tempest/services/compute/json/hypervisor_client.py b/tempest/services/compute/json/hypervisor_client.py
index 61a4dc1..e894a5c 100644
--- a/tempest/services/compute/json/hypervisor_client.py
+++ b/tempest/services/compute/json/hypervisor_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import hypervisors as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/images_client.py b/tempest/services/compute/json/images_client.py
index 172bbe2..b0ce2dc 100644
--- a/tempest/services/compute/json/images_client.py
+++ b/tempest/services/compute/json/images_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/compute/json/instance_usage_audit_log_client.py b/tempest/services/compute/json/instance_usage_audit_log_client.py
index c0841bf..f06a675 100644
--- a/tempest/services/compute/json/instance_usage_audit_log_client.py
+++ b/tempest/services/compute/json/instance_usage_audit_log_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import \
     instance_usage_audit_logs as schema
diff --git a/tempest/services/compute/json/interfaces_client.py b/tempest/services/compute/json/interfaces_client.py
index e5ab965..e8b2b64 100644
--- a/tempest/services/compute/json/interfaces_client.py
+++ b/tempest/services/compute/json/interfaces_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import interfaces as schema
 from tempest.api_schema.response.compute.v2_1 import servers as servers_schema
diff --git a/tempest/services/compute/json/keypairs_client.py b/tempest/services/compute/json/keypairs_client.py
index cf03a24..6f819ae 100644
--- a/tempest/services/compute/json/keypairs_client.py
+++ b/tempest/services/compute/json/keypairs_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import keypairs as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/limits_client.py b/tempest/services/compute/json/limits_client.py
index bfa340c..4287619 100644
--- a/tempest/services/compute/json/limits_client.py
+++ b/tempest/services/compute/json/limits_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import limits as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/migrations_client.py b/tempest/services/compute/json/migrations_client.py
index cd04e45..2a2bcd2 100644
--- a/tempest/services/compute/json/migrations_client.py
+++ b/tempest/services/compute/json/migrations_client.py
@@ -12,8 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import migrations as schema
diff --git a/tempest/services/compute/json/networks_client.py b/tempest/services/compute/json/networks_client.py
index cf9f534..6373f01 100644
--- a/tempest/services/compute/json/networks_client.py
+++ b/tempest/services/compute/json/networks_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/compute/json/quota_classes_client.py b/tempest/services/compute/json/quota_classes_client.py
index a741be4..30d3501 100644
--- a/tempest/services/compute/json/quota_classes_client.py
+++ b/tempest/services/compute/json/quota_classes_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1\
     import quota_classes as classes_schema
diff --git a/tempest/services/compute/json/quotas_client.py b/tempest/services/compute/json/quotas_client.py
index b038508..4ea47ed 100644
--- a/tempest/services/compute/json/quotas_client.py
+++ b/tempest/services/compute/json/quotas_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import quotas as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/security_group_default_rules_client.py b/tempest/services/compute/json/security_group_default_rules_client.py
index 304e759..fcc715a 100644
--- a/tempest/services/compute/json/security_group_default_rules_client.py
+++ b/tempest/services/compute/json/security_group_default_rules_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import \
     security_group_default_rule as schema
diff --git a/tempest/services/compute/json/security_groups_client.py b/tempest/services/compute/json/security_groups_client.py
index ca4f9bc..bee8d41 100644
--- a/tempest/services/compute/json/security_groups_client.py
+++ b/tempest/services/compute/json/security_groups_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/compute/json/servers_client.py b/tempest/services/compute/json/servers_client.py
index e95b613..1159a58 100644
--- a/tempest/services/compute/json/servers_client.py
+++ b/tempest/services/compute/json/servers_client.py
@@ -14,9 +14,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/compute/json/services_client.py b/tempest/services/compute/json/services_client.py
index 01f96af..e1b48bb 100644
--- a/tempest/services/compute/json/services_client.py
+++ b/tempest/services/compute/json/services_client.py
@@ -14,8 +14,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import services as schema
diff --git a/tempest/services/compute/json/tenant_networks_client.py b/tempest/services/compute/json/tenant_networks_client.py
index b15ebe3..d31c5f5 100644
--- a/tempest/services/compute/json/tenant_networks_client.py
+++ b/tempest/services/compute/json/tenant_networks_client.py
@@ -12,7 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.api_schema.response.compute.v2_1 import tenant_networks as schema
 from tempest.common import service_client
diff --git a/tempest/services/compute/json/tenant_usages_client.py b/tempest/services/compute/json/tenant_usages_client.py
index fac412e..cd9f3b6 100644
--- a/tempest/services/compute/json/tenant_usages_client.py
+++ b/tempest/services/compute/json/tenant_usages_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.compute.v2_1 import tenant_usages as schema
diff --git a/tempest/services/compute/json/volumes_extensions_client.py b/tempest/services/compute/json/volumes_extensions_client.py
index 121f160..ac55049 100644
--- a/tempest/services/compute/json/volumes_extensions_client.py
+++ b/tempest/services/compute/json/volumes_extensions_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/data_processing/v1_1/data_processing_client.py b/tempest/services/data_processing/v1_1/data_processing_client.py
index 04cf9a3..bbc0f2a 100644
--- a/tempest/services/data_processing/v1_1/data_processing_client.py
+++ b/tempest/services/data_processing/v1_1/data_processing_client.py
@@ -12,7 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/identity/v2/json/identity_client.py b/tempest/services/identity/v2/json/identity_client.py
index fd4160f..1076fca 100644
--- a/tempest/services/identity/v2/json/identity_client.py
+++ b/tempest/services/identity/v2/json/identity_client.py
@@ -10,7 +10,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
diff --git a/tempest/services/identity/v3/json/credentials_client.py b/tempest/services/identity/v3/json/credentials_client.py
index 281f3cd..e27f960 100644
--- a/tempest/services/identity/v3/json/credentials_client.py
+++ b/tempest/services/identity/v3/json/credentials_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/identity/v3/json/endpoints_client.py b/tempest/services/identity/v3/json/endpoints_client.py
index 44acb47..f93fb74 100644
--- a/tempest/services/identity/v3/json/endpoints_client.py
+++ b/tempest/services/identity/v3/json/endpoints_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/identity/v3/json/identity_client.py b/tempest/services/identity/v3/json/identity_client.py
index d8afd2c..87d4b79 100644
--- a/tempest/services/identity/v3/json/identity_client.py
+++ b/tempest/services/identity/v3/json/identity_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/identity/v3/json/policy_client.py b/tempest/services/identity/v3/json/policy_client.py
index 424fb1d..f820598 100644
--- a/tempest/services/identity/v3/json/policy_client.py
+++ b/tempest/services/identity/v3/json/policy_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/identity/v3/json/region_client.py b/tempest/services/identity/v3/json/region_client.py
index 9d7d496..43226be 100644
--- a/tempest/services/identity/v3/json/region_client.py
+++ b/tempest/services/identity/v3/json/region_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/identity/v3/json/service_client.py b/tempest/services/identity/v3/json/service_client.py
index c678918..52ff479 100644
--- a/tempest/services/identity/v3/json/service_client.py
+++ b/tempest/services/identity/v3/json/service_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/image/v1/json/image_client.py b/tempest/services/image/v1/json/image_client.py
index eae5c64..a07612a 100644
--- a/tempest/services/image/v1/json/image_client.py
+++ b/tempest/services/image/v1/json/image_client.py
@@ -15,11 +15,11 @@
 
 import copy
 import errno
-import json
 import os
 import time
 
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 import six
 from six.moves.urllib import parse as urllib
 from tempest_lib.common.utils import misc as misc_utils
diff --git a/tempest/services/image/v2/json/image_client.py b/tempest/services/image/v2/json/image_client.py
index 95972ae..67f7708 100644
--- a/tempest/services/image/v2/json/image_client.py
+++ b/tempest/services/image/v2/json/image_client.py
@@ -13,9 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
 import jsonschema
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/messaging/json/messaging_client.py b/tempest/services/messaging/json/messaging_client.py
index b99e0a7..2f233a9 100644
--- a/tempest/services/messaging/json/messaging_client.py
+++ b/tempest/services/messaging/json/messaging_client.py
@@ -13,9 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import json
 import uuid
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.api_schema.response.messaging.v1 import queues as queues_schema
diff --git a/tempest/services/network/json/network_client.py b/tempest/services/network/json/network_client.py
index b3663fc..aa0c583 100644
--- a/tempest/services/network/json/network_client.py
+++ b/tempest/services/network/json/network_client.py
@@ -10,9 +10,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib.common.utils import misc
 from tempest_lib import exceptions as lib_exc
diff --git a/tempest/services/object_storage/account_client.py b/tempest/services/object_storage/account_client.py
index dece763..d89aa5d 100644
--- a/tempest/services/object_storage/account_client.py
+++ b/tempest/services/object_storage/account_client.py
@@ -13,9 +13,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 from xml.etree import ElementTree as etree
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/object_storage/container_client.py b/tempest/services/object_storage/container_client.py
index 8e225b0..b31fe1b 100644
--- a/tempest/services/object_storage/container_client.py
+++ b/tempest/services/object_storage/container_client.py
@@ -13,9 +13,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 from xml.etree import ElementTree as etree
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/orchestration/json/orchestration_client.py b/tempest/services/orchestration/json/orchestration_client.py
index 4d443d3..84a9ed9 100644
--- a/tempest/services/orchestration/json/orchestration_client.py
+++ b/tempest/services/orchestration/json/orchestration_client.py
@@ -13,10 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import re
 import time
 
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/volume/json/admin/volume_hosts_client.py b/tempest/services/volume/json/admin/volume_hosts_client.py
index 260679e..6801453 100644
--- a/tempest/services/volume/json/admin/volume_hosts_client.py
+++ b/tempest/services/volume/json/admin/volume_hosts_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/volume/json/admin/volume_services_client.py b/tempest/services/volume/json/admin/volume_services_client.py
index 2b2a696..c8607c1 100644
--- a/tempest/services/volume/json/admin/volume_services_client.py
+++ b/tempest/services/volume/json/admin/volume_services_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 
 from tempest.common import service_client
diff --git a/tempest/services/volume/json/admin/volume_types_client.py b/tempest/services/volume/json/admin/volume_types_client.py
index 9a75f6c..84c7bc5 100644
--- a/tempest/services/volume/json/admin/volume_types_client.py
+++ b/tempest/services/volume/json/admin/volume_types_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/volume/json/availability_zone_client.py b/tempest/services/volume/json/availability_zone_client.py
index e60d5c1..13d5d55 100644
--- a/tempest/services/volume/json/availability_zone_client.py
+++ b/tempest/services/volume/json/availability_zone_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/volume/json/backups_client.py b/tempest/services/volume/json/backups_client.py
index bf9af6e..0f83b8d 100644
--- a/tempest/services/volume/json/backups_client.py
+++ b/tempest/services/volume/json/backups_client.py
@@ -13,9 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
+from oslo_serialization import jsonutils as json
+
 from tempest.common import service_client
 from tempest import exceptions
 
diff --git a/tempest/services/volume/json/extensions_client.py b/tempest/services/volume/json/extensions_client.py
index 3bf468a..1098e1e 100644
--- a/tempest/services/volume/json/extensions_client.py
+++ b/tempest/services/volume/json/extensions_client.py
@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
+from oslo_serialization import jsonutils as json
 
 from tempest.common import service_client
 
diff --git a/tempest/services/volume/json/qos_client.py b/tempest/services/volume/json/qos_client.py
index 37ab9cd..e3d6a29 100644
--- a/tempest/services/volume/json/qos_client.py
+++ b/tempest/services/volume/json/qos_client.py
@@ -12,9 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
+from oslo_serialization import jsonutils as json
 from tempest_lib import exceptions as lib_exc
 
 from tempest.common import service_client
diff --git a/tempest/services/volume/json/snapshots_client.py b/tempest/services/volume/json/snapshots_client.py
index 7f7cceb..fa1f9dd 100644
--- a/tempest/services/volume/json/snapshots_client.py
+++ b/tempest/services/volume/json/snapshots_client.py
@@ -10,10 +10,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import time
 
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
 
diff --git a/tempest/services/volume/json/volumes_client.py b/tempest/services/volume/json/volumes_client.py
index b8e3464..26f186e 100644
--- a/tempest/services/volume/json/volumes_client.py
+++ b/tempest/services/volume/json/volumes_client.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
+from oslo_serialization import jsonutils as json
 import six
 from six.moves.urllib import parse as urllib
 from tempest_lib import exceptions as lib_exc
diff --git a/tempest/test.py b/tempest/test.py
index 80e61c7..0e60041 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -15,7 +15,6 @@
 
 import atexit
 import functools
-import json
 import os
 import re
 import sys
@@ -25,6 +24,7 @@
 
 import fixtures
 from oslo_log import log as logging
+from oslo_serialization import jsonutils as json
 from oslo_utils import importutils
 import six
 import testscenarios
diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index 197bd0c..2701f02 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -13,12 +13,16 @@
 # under the License.
 
 import abc
+import logging
 
 import six
 import stevedore
 from tempest_lib.common.utils import misc
 
 
+LOG = logging.getLogger(__name__)
+
+
 @six.add_metaclass(abc.ABCMeta)
 class TempestPlugin(object):
     """A TempestPlugin class provides the basic hooks for an external
@@ -46,8 +50,14 @@
     """
     def __init__(self):
         self.ext_plugins = stevedore.ExtensionManager(
-            'tempest.test.plugins', invoke_on_load=True,
-            propagate_map_exceptions=True)
+            'tempest.test_plugins', invoke_on_load=True,
+            propagate_map_exceptions=True,
+            on_load_failure_callback=self.failure_hook)
+
+    @staticmethod
+    def failure_hook(_, ep, err):
+        LOG.error('Could not load %r: %s', ep.name, err)
+        raise err
 
     def get_plugin_load_tests_tuple(self):
         load_tests_dict = {}
diff --git a/tempest/test_discover/test_discover.py b/tempest/test_discover/test_discover.py
index 86aa855..dac7d91 100644
--- a/tempest/test_discover/test_discover.py
+++ b/tempest/test_discover/test_discover.py
@@ -48,8 +48,8 @@
     for plugin in plugin_load_tests:
         test_dir, top_path = plugin_load_tests[plugin]
         if not pattern:
-            suite.addTests(loader.discover(test_dir, top_level=top_path))
+            suite.addTests(loader.discover(test_dir, top_level_dir=top_path))
         else:
             suite.addTests(loader.discover(test_dir, pattern=pattern,
-                                           top_level=top_path))
+                                           top_level_dir=top_path))
     return suite
diff --git a/tempest/tests/cmd/test_verify_tempest_config.py b/tempest/tests/cmd/test_verify_tempest_config.py
index 7286d76..6bc96f2 100644
--- a/tempest/tests/cmd/test_verify_tempest_config.py
+++ b/tempest/tests/cmd/test_verify_tempest_config.py
@@ -12,9 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 
 import mock
+from oslo_serialization import jsonutils as json
 from oslotest import mockpatch
 
 from tempest.cmd import verify_tempest_config
diff --git a/tempest/tests/fake_identity.py b/tempest/tests/fake_identity.py
index ad78f85..d0de927 100644
--- a/tempest/tests/fake_identity.py
+++ b/tempest/tests/fake_identity.py
@@ -13,9 +13,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
-
 import httplib2
+from oslo_serialization import jsonutils as json
 
 FAKE_AUTH_URL = 'http://fake_uri.com/auth'
 
diff --git a/tempest/tests/services/__init__.py b/tempest/tests/services/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/tests/services/__init__.py
diff --git a/tempest/tests/services/compute/__init__.py b/tempest/tests/services/compute/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/tests/services/compute/__init__.py
diff --git a/tempest/tests/services/compute/test_agents_client.py b/tempest/tests/services/compute/test_agents_client.py
new file mode 100644
index 0000000..e8ea525
--- /dev/null
+++ b/tempest/tests/services/compute/test_agents_client.py
@@ -0,0 +1,50 @@
+# Copyright 2015 NEC Corporation.  All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import httplib2
+
+from oslotest import mockpatch
+
+from tempest.services.compute.json import agents_client
+from tempest.tests import base
+from tempest.tests import fake_auth_provider
+from tempest.tests import fake_config
+
+
+class TestAgentsClient(base.TestCase):
+
+    def setUp(self):
+        super(TestAgentsClient, self).setUp()
+        self.useFixture(fake_config.ConfigFixture())
+        fake_auth = fake_auth_provider.FakeAuthProvider()
+        self.client = agents_client.AgentsClient(fake_auth,
+                                                 'compute', 'regionOne')
+
+    def _test_list_agents(self, bytes_body=False):
+        if bytes_body:
+            body = bytes(b'{"agents": []}')
+        else:
+            body = '{"agents": []}'
+        expected = []
+        response = (httplib2.Response({'status': 200}), body)
+        self.useFixture(mockpatch.Patch(
+            'tempest.common.service_client.ServiceClient.get',
+            return_value=response))
+        self.assertEqual(expected, self.client.list_agents())
+
+    def test_list_agents_with_str_body(self):
+        self._test_list_agents()
+
+    def test_list_agents_with_bytes_body(self):
+        self._test_list_agents(bytes_body=True)
diff --git a/tempest/tests/test_glance_http.py b/tempest/tests/test_glance_http.py
index 71aa395..105caec 100644
--- a/tempest/tests/test_glance_http.py
+++ b/tempest/tests/test_glance_http.py
@@ -13,10 +13,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import json
 import socket
 
 import mock
+from oslo_serialization import jsonutils as json
 from oslotest import mockpatch
 import six
 from six.moves import http_client as httplib
diff --git a/test-requirements.txt b/test-requirements.txt
index 7115168..8fcf071 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,4 +10,4 @@
 mock>=1.1;python_version!='2.6'
 mock==1.0.1;python_version=='2.6'
 coverage>=3.6
-oslotest>=1.5.1 # Apache-2.0
+oslotest>=1.7.0 # Apache-2.0